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galina1969 [7]
3 years ago
13

Using the side-splitter theorem, Daniel wrote a proportion for the segments formed by line segment DE. What is EC?

Mathematics
2 answers:
Brilliant_brown [7]3 years ago
5 0
Let's EC = x
5/3 = 4/x

5x = 4(3)
5x = 12
x = 12/5
x = 2.4

answer

<span>2.4 units</span>
PIT_PIT [208]3 years ago
5 0

correct answer is 2.4 on edg

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kompoz [17]

Answer:

608

Step-by-step explanation:

The appropriate general formula here is a(n) = a(1) + (n -1)d, where d is the common difference.  Here, d = +7.  Thus:

a(92) = -29 + (92-1)(7) = 608

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When addressing an envelope for delivery in the United States or Canada, the zip code should appear
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3 years ago
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pantera1 [17]

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3 0
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7 0
4 years ago
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VLD [36.1K]

Answer:

3.13

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We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

\chi^2_{1-\frac{\alpha}{2}}= 51.770

Chi square critical value for upper tail =

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80% confidence interval:

\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}

Putting values, we get,

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Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

8 0
3 years ago
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